AA 咖啡豆 AA Coffee Beans
AA 是指咖啡生豆以大小分級中最大顆的等級，常以此來分級的地區是肯亞或新幾內亞。從大到小依序是AA、AB、PB等。
AA refers to the largest size grading in the classification of coffee beans. This grading system is commonly used in regions such as Kenya or Papua New Guinea. The sizes, from largest to smallest, are AA, AB, PB, and so on.
AA是17~18目之間大小的豆子，即會通過18目(直徑18/64英寸，約為7.20公厘)的篩孔，但無法通過16級(直徑16/64英寸)的篩孔，是AA等級。
AA beans fall within the size range of 17-18 screen size. They can pass through a sieve with an 18/64-inch diameter (approximately 7.20 mm) but cannot pass through a sieve with a 16/64-inch diameter. This classification is known as AA.
AB是16目的A加上15目的B、這兩種會混在一起賣，所以稱為AB，大部份的豆子是在這個等級。
AB is a mixture of A beans from the 16/64-inch screen and B beans from the 15/64-inch screen. These two sizes are combined and sold together, hence the term AB. The majority of coffee beans fall into this category.
PB就是小圓豆，一般一顆咖啡果有兩顆咖啡豆組成，圓豆則是一顆咖啡果裡只有一顆豆子。
PB refers to peaberries, which are smaller, rounder beans. Normally, a coffee cherry contains two coffee beans, but in the case of peaberries, there is only one bean in the cherry.
其他還有比較不常見的E(大顆的象豆)、C(12目~14目)等分級。
There are also less common grades such as E (larger elephant beans) and C (ranging from 12/64 to 14/64-inch screen size).
大小顆不是咖啡好壞的絕對標準，只是看到愈大顆豆子、令人感到愈珍貴吧，試看看肯亞AA，值得細細品味。
The size of the beans is not an absolute indicator of coffee quality. However, larger beans are often perceived as more precious. It's worth trying Kenyan AA coffee and savoring its unique flavors.
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